Removed :?? operator from routing DSL
Dropped support of old fashioned templates (symbolDsl)
Added Scala 3 support. Levhsa optimizer should work better in Scala 3
Performance improvements

As programmers, we tend to think of expressive power of a language or library as an unmitigated good. In this talk I want to show the contrary; that restraint and precision are usually better than power and flexibility. A constraint on component design leads to freedom and power when putting those components together into systems.

What’s more, this feature is built into the very nature of language and reasoning.